package cn.com.shaom.learning.sb.security.example3;

import org.springframework.security.access.SecurityMetadataSource;
import org.springframework.security.access.intercept.AbstractSecurityInterceptor;
import org.springframework.security.access.intercept.InterceptorStatusToken;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import java.io.IOException;

/**
 * ClassName: MyFilterSecurityInterceptor
 * Description: 自定义的filter
 * 必须包含 authenticationManager,accessDecisionManager,securityMetadataSource三个属性
 * Date: 2018/1/26 16:02 【需求编号】
 *
 * @author Sam Sho
 * @version V1.0.0
 */
public class CustomSecurityInterceptor extends AbstractSecurityInterceptor implements Filter {

    private FilterInvocationSecurityMetadataSource securityMetadataSource;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        FilterInvocation fi = new FilterInvocation(request, response, chain);
        invoke(fi);
    }

    @Override
    public void destroy() {

    }

    @Override
    public Class<?> getSecureObjectClass() {
        return FilterInvocation.class;
    }

    @Override
    public SecurityMetadataSource obtainSecurityMetadataSource() {
        return this.securityMetadataSource;
    }

    public void setSecurityMetadataSource(FilterInvocationSecurityMetadataSource securityMetadataSource) {
        this.securityMetadataSource = securityMetadataSource;
    }

    public FilterInvocationSecurityMetadataSource getSecurityMetadataSource() {
        return securityMetadataSource;
    }

    public void invoke(FilterInvocation fi) throws IOException, ServletException {
        InterceptorStatusToken token = super.beforeInvocation(fi);
        try {
            fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
        } finally {
            super.finallyInvocation(token);
        }
        super.afterInvocation(token, null);
    }


}
